1. The stoicheiometry of the photo-oxidation of succinate by chromatophores has been investigated with [2,3-(14)C(2)]succinate. It was found that there is a stoicheiometric relationship between the amount of succinate oxidized and the NAD reduced, and that fumarate is the only product of succinate oxidation. 2. The possibility of a direct hydrogen transfer from succinate to NAD in this reaction...

Female German cockroaches usually carry their oothecae until they hatch. The success of embryogenesis may be dependent on the water-balance relationship between females and their developing oothecae. Oothecae detached from females early in embryogenesis often fail to develop, especially in low-humidity environments. Experiments reported here using tritiated water have confirmed the transport of...

Utilization of Photodisintegration reaction of Deuterium, H(γ,n)H, is a precise technique for determining the percentage of H in tritiated and natural water. The Na(n,γ)Na reaction is a suitable γ-source for producing the H(γ,n)H reaction. Tehran Research Reactor was used as a neutron source for producing Na isotopes. The BF3 detectors were used to detect the neutron emission of H2 content of w...

An investigation of water absorption from the small intestine after abdominal surgery has produced more detailed information on the effect of trauma on the motility of the gastro-intestinal tract. Whereas after trauma the equilibration of tritiated water given by the oral and colonic routes is retarded, given by the jejunal route it is normal.